From: Maxime Ripard <mripard@kernel.org>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>,
Simona Vetter <simona@ffwll.ch>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
Jyri Sarha <jyri.sarha@iki.fi>,
Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>,
Andrzej Hajda <andrzej.hajda@intel.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Robert Foss <rfoss@kernel.org>, Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 09/14] drm/drv: Call drm_mode_config_create_state() by default
Date: Fri, 20 Mar 2026 08:39:32 +0100 [thread overview]
Message-ID: <20260320-competent-voracious-wapiti-0c5afd@houat> (raw)
In-Reply-To: <20260316163354.GN31604@killaraus.ideasonboard.com>
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On Mon, Mar 16, 2026 at 06:33:54PM +0200, Laurent Pinchart wrote:
> On Tue, Mar 10, 2026 at 05:07:01PM +0100, Maxime Ripard wrote:
> > Almost all drivers, and our documented skeleton, call
> > drm_mode_config_reset() prior to calling drm_dev_register() to
> > initialize its DRM object states.
> >
> > Now that we have drm_mode_config_create_state() to create that initial
> > state if it doesn't exist, we can call it directly in
> > drm_dev_register(). That way, we know that the initial atomic state will
> > always be allocated without any boilerplate.
>
> Should most drivers now stop calling drm_mode_config_reset() at probe
> time ?
Yes, that's my intention. For the vast majority of them, reset is just
about allocating and committing a blank state anyway.
However, for the drivers that do need to reset the hardware, we should
keep the door open (and / or provide an alternative mechanism).
Maxime
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next prev parent reply other threads:[~2026-03-20 7:39 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-10 16:06 [PATCH 00/14] drm/atomic: Rework initial state allocation Maxime Ripard
2026-03-10 16:06 ` [PATCH 01/14] drm/atomic: Document atomic state lifetime Maxime Ripard
2026-03-11 6:44 ` Tomi Valkeinen
2026-03-16 15:31 ` Laurent Pinchart
2026-03-19 13:20 ` Maxime Ripard
2026-03-10 16:06 ` [PATCH 02/14] drm/atomic: Drop drm_private_state.obj assignment from create_state Maxime Ripard
2026-03-16 15:49 ` Laurent Pinchart
2026-03-16 17:16 ` Maxime Ripard
2026-03-10 16:06 ` [PATCH 03/14] drm/mode-config: Mention drm_mode_config_reset() culprits Maxime Ripard
2026-03-16 15:53 ` Laurent Pinchart
2026-03-10 16:06 ` [PATCH 04/14] drm/atomic-state-helper: Fix __drm_atomic_helper_plane_reset() doc typo Maxime Ripard
2026-03-11 6:46 ` Tomi Valkeinen
2026-03-16 15:54 ` Laurent Pinchart
2026-03-10 16:06 ` [PATCH 05/14] drm/plane: Add new atomic_create_state callback Maxime Ripard
2026-03-11 7:13 ` Tomi Valkeinen
2026-03-11 7:46 ` Maxime Ripard
2026-03-16 16:16 ` Laurent Pinchart
2026-03-10 16:06 ` [PATCH 06/14] drm/crtc: " Maxime Ripard
2026-03-10 16:06 ` [PATCH 07/14] drm/connector: " Maxime Ripard
2026-03-10 16:07 ` [PATCH 08/14] drm/mode-config: Create drm_mode_config_create_state() Maxime Ripard
2026-03-16 16:32 ` Laurent Pinchart
2026-03-19 14:17 ` Maxime Ripard
2026-03-10 16:07 ` [PATCH 09/14] drm/drv: Call drm_mode_config_create_state() by default Maxime Ripard
2026-03-16 16:33 ` Laurent Pinchart
2026-03-20 7:39 ` Maxime Ripard [this message]
2026-03-10 16:07 ` [PATCH 10/14] drm/atomic: Drop private obj state allocation Maxime Ripard
2026-03-16 16:34 ` Laurent Pinchart
2026-03-10 16:07 ` [PATCH 11/14] drm/drv: Drop drm_mode_config_reset() from our skeleton Maxime Ripard
2026-03-11 6:54 ` Tomi Valkeinen
2026-03-10 16:07 ` [PATCH 12/14] drm/tidss: Drop call to drm_mode_config_reset at probe time Maxime Ripard
2026-03-11 7:40 ` Tomi Valkeinen
2026-03-11 8:18 ` Tomi Valkeinen
2026-03-10 16:07 ` [PATCH 13/14] drm/tidss: Convert to atomic_create_state Maxime Ripard
2026-03-11 7:41 ` Tomi Valkeinen
2026-03-16 16:40 ` Laurent Pinchart
2026-03-10 16:07 ` [PATCH 14/14] drm/bridge_connector: " Maxime Ripard
2026-03-16 16:42 ` Laurent Pinchart
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